What is QR code technology and how does it work?
QR (Quick Response) codes are two-dimensional matrix barcodes that can store large amounts of data including URLs, text, and contact information. Developed in Japan in 1994 for automotive industry tracking, QR codes use error correction algorithms to ensure reliable scanning even if partially damaged. Modern QR codes can encode up to 4,296 characters and support international character sets. They revolutionized mobile marketing, payment systems, and digital information sharing worldwide. Learn more about QR code technology and optical data storage.
How to use the QR Code Generator tool?
- Enter your text or URL in the input field (supports URLs, text, contact info)
- Adjust the size for your intended use (larger for better scanning distance)
- Choose error correction level (H for damaged codes, L for high data capacity)
- Generate and download your QR code as PNG or copy to clipboard
Common use cases for QR codes
- Business marketing - connect customers to websites, menus, or contact information
- Payment processing - enable quick payments through banking apps and digital wallets
- Event management - provide instant access to event details, schedules, or check-in
- Education - share learning resources, assignments, or interactive content
- Product information - link to specifications, reviews, or safety data sheets
Frequently Asked Questions
Level L (Low) allows 7% damage, M (Medium) 15%, Q (Quartile) 25%, and H (High) 30%. Choose higher levels for codes that might get damaged, or lower levels to store more data in smaller codes.
QR codes can hold up to 4,296 alphanumeric characters, 7,089 numeric-only digits, or 2,953 bytes of binary data. The actual capacity depends on the error correction level and character encoding used.
Yes! All QR code generation happens 100% in your browser. Your data never leaves your device and is not stored on any server, ensuring complete privacy and security of your information.